Build linux/x86_64 Docker images

[SamMurphyDev]

Hi there,

In your releases, you're providing linux/x86_64 binaries, but the docker image for the last little is only as linux/arm64 image.

Are you able to configure your docker images for multi-arch.

Cheers, Sam

[sebdanielsson]

@justmiles this would be much appreciated!